I liked the headrush gui and looper better then others but the amps and effects are lacking for me and need to be updated and added to for that price of a unit.The Headrush is the easiest modeler I've ever used. Big touch screen and pretty simplified controls.
I played the 100w JCM800 last night and it was a blast. Cranked up the volume/gain, dropped the presence/treble, added a good impulse with a little reverb and delay, and it was sounding great. Nice crunchy tone with the volume on 10, roll back to 5 for crystal clean tone, hit a boost to go over the top.